Shock-absorber.



- ers; 'and l do hereby declare the following llllll S`ATES PATENT 'Q AFRED' FOSTER,'OF SCRANTON, PENNSYLVANIA:

SHOCK-ABSORBER. f

Specification of Letters Patent. u Patgntgd Jung??? g;

Application led November 26, 1915. ySeria11 c.v63,570.

i To all whom it may coince/rn.'

. Be it known that I, FRED Fos'rER, avciti- .zen of the UnitedStates,`residing at Scranton, in the county of Lackawanna and State ofPennsylvania, have invented. certain new and useful linprovenjients in.Shoclr-Absorb to be a full, clear, vand exact description of @theinvention, such as will enable others skilled in the art to which itappertains to make and use the saine.

-The present invention is a shock absorber in the nature `of a'supplemental spring, in tended for application to the spring already inuse on a vehicle, and in the accompanyingdrawings and following'specitication I have shown and described itl as applied to anautomobile spring. f

The purpose ot the invention 1s to provide an extremely cheap 'andsimple shock absorber which can be applied without special tools orexpert knowledge, and which when in place takes muchot' the shock offthe springs while producing little ifvany increase in the possibilitiesfor longitudinal 4and lateral movements 'of such spring.

Details are set' forth in the following .,speciiic'atio'n andillustrated inthe drawings wherein:

Figure l'is a side elevation of this Idevice as applied toasemi-'elliptical spring at the front of an automobile frame. Fig. 2 isa side elevation showing the applical tion of this device at the rear ofsuch a V:trame and .to a three-quarter elliptical spring, theH partsvbeing slightly disconnected in this view. Fig. 3' is an' enlargedsection through the center of the shock absorbing spring itself.

While this shock absorber is applicable in a variety of places, l intendit and have shown it as applied' to the spring S beneath by a shacklessuch, as a pair vofi links L, soA

an automobile frame F, and one end oi' this spring is connectedat P to aixedpivot on the frame while ordinarily the other end of the spring isconnected with the frame that this end oi' the spring has a swingingmovement. ln Fig.v 2 the letter Q designates thethird quarter ot theentire main spring, its inner end being connected with the frame landits outer end carrying an eye in which we can assume that the vlinks Lwere pivoted bei-ore my inventionwas 'applied. `While it is true thatthe. outer end of this 'spring Q; has' a slight oblique movement underpressure, `yet the swinging lsupport ofthe main spring S- is due topres- 'nected with the eye of a bracket y1a on the frame F or with theeyes 15 at the outer end of the spring Q., andthe lower eye 16 connectedto the pivot at'the lowerend et 4the shackle or vlinks L, this spring l0is in place and in order .that yit will not come in contact with asemi-elliptical' spring as beyond v'its upper eyes 13V and curvev itover and downward as 'at 17 so that ample space is left for the pivotalpoint 18 between upper end of the shackle and the extre'initv of thespring S. While a single spring 1Q may be:V employed vfor lightveliicles,"the

shock .absorber may include. a numberl ci? leaves as shown at 20, 21 and22, and-by preference-these are V-shaped and are nestfA Shock' absorber'@aan 'shown at S, l carry itslower arm V1.2 out ed within'veach other asbest seen in Fig. 3..

Their angles should, be connected in'sonie 'f proper way, as by the boltor 'rivet 25, yand this inner or rentrant end of the entire shockabsorber stands between'` the frame F and the spring S, and preferablyin a single vertical .plane with such members.

The application of this improvedy shock absorber is obvious and easy.Oneend of the .spring Sfis disconnectedfrom the eye at 140r-15,'the.links of the shackle'turned downwardl around their pivot 18,the shock pivoted tothe frame or tothe spring Q, if one be present,while its eye 16 is pivoted to the shackle.- lVhen now a shock occursand the axle A rises suddenly, much 'et the irst impact of the shock istaken up ,the springl() and its various lentes. 'But el viously the mainspring S will straighten out to a Slight extent-'and thereforethepivotal point- 18 is carried out into'th'e bend 17' 'absorber-insertedin place, and its eyes 1 3,

so that thetendency will beter' the'pivotal 1 point 16 .to rise.,obliquely.jtowadftlelileft as shown lin the drawings, rather thandirectly upward as it 'would do under 'ordinary circumstances. -On therebound,l also,

'the movement of the main spring may draw 'the pivotal point 18 inwardbeyond its or.-v

dinary position; and in order that the links 'composing the shacklema-yswing uninterruptedly, 'I' have provided thelower arm 12 ofthe'shock absorber spring with the ample,

bend 'or curve Occasions will occur, however, when this forward andbackward movement of the rear end of 'the main spring is so excessivethat the oblique draft 4by the shackle on thelower end of the V- -shapedspring 10 is sufficient. while its upper. end at -13 is connected by 'arelatively Xedpivot'with the frame F, to cause its center or angle tomove upward or down- Ward within the space betweenthe frame l 'of the'latter the .inner end of the spring upper bumper t'orts the parts thatthe draft on the shackle is quite oblique, the, inner end of the V-shaped spring will be-t'hrown'down but the lower bumper 27will prevent1t from injuring the main spring [may be thrown up 'sufficiently tostrike the '26 against the frame F. Of course the parts could be openedto such an extent that this would not occur, but with the frame and mehrspring and shock' absorber all standing in one plane and set as closelyunder ordinarycircumstances, I consider the'use of this bumper adesirable safeguard.

IVhatI claim is: f 1. The combination with a vehicle frame,

a leaf spring, anda rentrant spring stand- '.curved around the leafspring;

ivot between 'one end of said leaf spring y ing between said elementsand with one arm of a fixed and the frame, links pivotally 'connectingits other end with said curved arm of the rentrant spring. and aV fixedpivot connecting between the other 'armthereofand said frame.

2. The combination with a vehicle frame,l

and a main spring connected at one .end thereto by a fixed pivot; of aV-shaped shock absorbing spring standing between the main spring andframe and with its upper arm pivotally connected with such Therefore Ihave limited at all S, and Von the rebound.

-frame and its-lower arm curving around to an'eye below the end of themain spring, and a 4pair of links pivotally connecting said eyeand end.

3. The combinatlon witlia vehicle frame, an axle, and a leaf springcentrally secured to the axle and connected at its inner end by a fixedpivot to the, frame; of av reentrant shock absorber having its upper endi connected by a fixed pivot with the frame and its lower end curvedaround under the louter end of the spring, and va. swinging connectionbetween these ends.

4. The combination with a vehicle frame, an axle, and a leaf springcentrally secured Lo the axle and cpnnected at its inner end y al fixedpivot to the frame;- of a bent shock absorber standing between and in avertical plane with the frame and spring with its upper end pivotallyconnected with the frame and its lower end curved around. under theouter end of the spring, and, a

shackle pivotally' connecting these ends.

5. The combination with a vehicle frame, land a main spring underlyingit.; of a. y" shaped shock absorbery standing between the spring andframeandhaving its arms connected with them, and a bumper carried by itsanele. y

6.; 'ie combination with a vehicle frame, a leaf spring underlying it,and a v -shaped springbetw'een and ,in vertical alinement -with saidelements; ofa bumper onthe ,inner f end of the V-shaped spring, pivotal:connections between one 'end of eachv spring and the frame,and-swinging connections be- ,Y A

tween the other ends of the springs.

7. The combination with a vehicle frame, and a main spring 'connected atone end thereto bya fixed pivot; of. a V-shape'd shock absorber betweenthe spring and frame, pivotal connections between 4one endv thereof andsaid frame, a. 'link connecting its other end with the other end of saidspring, anda bumper carried by its angle. 8. The'combinationwith avehicle `frame,

an axle, and a Senn-elliptical spring connected at the center with theaxle and at -one end with said Jframe; of a shock-ablsorberlcomprising aV-Shaped spring Vwhose upper arm ,is pivotally connected with the frameand whose lower arm curves'around the adjacent end" of thesemi-elliptical spring, said arm and spring having 'eyes at4 theirextremities, V-shaped leaves within said V-shaped spring, clipsembracing said 4arms and leaves, bumpers carried by'the clips above andbelow the inner end of the shock absorber, and ashackle pivotallyconnecting said eyes. y

In testimony whereof I aiix-my signature. I

' FRED FOSTER.

